Three months. Saiko Himeno had to date Shinichiro Sano for three months or else she loses the bet. Shinichiro doesn't know about it and Saiko doesn't know about his involvement with the Black Dragon. This is going to be one interesting "relationship." Warning: Blood, gore, SA, lemons, swearing, violence, small manga spoilers, and many more. [Disclaimer: I only own Saiko and everyone unrecognizable, along with the plot. Anything Tokyo Revengers related belong to Ken Wakui.]